package com.yequan.work;

import java.util.*;

/**
 * @author yequan
 * @date 2021/03/03 11:53
 **/
public class MapDemo {

    public static void main(String[] args) {
//        bank();
        blank();
    }

    public static void bank(){
        Map<String, Integer> param = new HashMap<>();
        param.put("userId", 148523501);
        System.out.println(JsonMapper.toJson(param));
        String d= "{\"userId\":148523501}";
    }

    public static void blank(){
        Map<String, Integer> param = new HashMap<>();
        param.put("userId", 148523501);

        Integer a = param.get("a");
        System.out.println(a);
    }

}
